Dictionary

realgar

noun re·al·gar \rē-ˈal-ˌgär, -gər\

Definition of REALGAR

:  an orange-red mineral consisting of arsenic sulfide and having a resinous luster
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Origin of REALGAR

Middle English, from Medieval Latin, from Catalan, from Arabic rahj al-ghār powder of the mine
First Known Use: 15th century

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